SHAMSELDEEN YOUNES MOHAMED MAHMOUD M.D
NPI 1023438835
Radiology - Neuroradiology in Saint Louis, MO

Q: What is Shamseldeen Mahmoud's NPI number?

The NPI number for Shamseldeen Mahmoud is 1023438835. It was assigned to this individual provider in the NPPES registry on April 18, 2014.

Q: What is Shamseldeen Mahmoud's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Neuroradiology, with taxonomy code 2085N0700X.

Active since April 18, 2014PECOS EnrolledAccepts Medicare Assignment

92.56/100

CMS Quality Rating

1201 S GRAND BLVD, SAINT LOUIS, MO 63104(314) 257-8000 Get Directions Write a Review

NPPES record last updated: November 20, 2025. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Nov 20, 2025, Mar 12, 2025, Jul 25, 2022 and 2 more (5 updates tracked since 2017).

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About Shamseldeen Younes Mohamed Mahmoud M.d NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

SHAMSELDEEN YOUNES MOHAMED MAHMOUD M.D (NPI 1023438835) is an individual neuroradiology provider in Saint Louis, Missouri, licensed in Missouri (2018017241) and active in the NPI registry since April 2014. He is enrolled in Medicare PECOS, is affiliated with Ssm Health St Mary's Hospital - St Louis, and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1023438835

Entity TypeIndividualMale

Primary Taxonomy2085N0700X

Provider Legal NameSHAMSELDEEN YOUNES MOHAMED MAHMOUDCredential: M.D

Location Address1201 S GRAND BLVDSaint Louis, MO 63104-1016

Mailing Address1201 S Grand BlvdSaint Louis, MO 63104-1016

Phone(314) 257-8000

Sole ProprietorYes

Medical School CMSOtherGraduated 1991

Enumeration DateApril 18, 2014

Last NPPES UpdateNovember 20, 20255 updates tracked since enumeration

NPPES CertifiedNovember 20, 2025

✔ NPI 1023438835 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyRadiology · NeuroradiologyAllopathic & Osteopathic Physicians

Taxonomy Code2085N0700X

Licenses✔ Licensed in MO · 2018017241✔ Licensed in IL · 125.071554

Definition

A radiologist who diagnoses and treats diseases utilizing imaging procedures as they relate to the brain, spine and spinal cord, head, neck and organs of special sense in adults and children.

Also ListedRadiology · Diagnostic RadiologyTaxonomy 2085R0202X · License 2018017241 (MO)

1201 S GRAND BLVD, Saint Louis, MO 63104

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Secondary Practice Locations 2

Location 13600 Minnesota Dr Ste 800Edina, MN 55435-7915 · Phone (952) 595-1301 · Fax (612) 294-4903

Location 2395 W 12th AveColumbus, OH 43210-1267 · Phone (614) 293-8315 · Fax (614) 293-6935

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, CareSource, Oscar Insurance Company.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Shamseldeen Younes Mohamed Mahmoud M.d is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID446521967

PECOS Enrollment IDI20180810002865

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show Shamseldeen Mahmoud reassigns Medicare billing to 9 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Ssm Health Care Group

Same address

Internal Medicine

1225 SOUTH GRAND BLVD, 2L - DOOR 3,4
Saint Louis, MO 63104

Reassigned Medicare billing, Missouri enrollment
1,294 clinicians in this Medicare group

NPI 1306589544 (314) 977-6100

Ssm Cardinal Glennon Childrens Hospital

13 mi

Pediatrics

2927 S . KINGS HIGHWAY BLVD
Saint Louis, MO 63139

Reassigned Medicare billing, Missouri enrollment
Medicare enrollment name: Ssm Cardinal Glennon Children's Hospital
414 clinicians in this Medicare group

NPI 1073568226 (314) 268-4070

Fred Smeltzer MD & Associates Inc

137 mi

Diagnostic Radiology

54 HOSPITAL DR
Osage Beach, MO 65065

Reassigned Medicare billing, Missouri enrollment
15 clinicians in this Medicare group

NPI 1639122286 (573) 348-8353

Specialists In Medical Imaging Sc

241 mi

Diagnostic Radiology

20201 CRAWFORD AVE
Olympia Fields, IL 60461

Reassigned Medicare billing, Missouri enrollment
13 clinicians in this Medicare group

NPI 1841687951 (708) 747-4000

Osu Radiology LLC

398 mi

Diagnostic Radiology

520 W 10TH AVE
Columbus, OH 43210

Reassigned Medicare billing, Missouri enrollment

NPI 1912956814 (614) 293-8315

Virtual Radiologic Professionals, LLC

459 mi

Diagnostic Radiology

3600 MINNESOTA DR STE 800
Edina, MN 55435

Reassigned Medicare billing, Missouri enrollment
14 clinicians in this Medicare group

NPI 1932342029 (952) 595-1301

Radiology Associates Of South Carolina LLC

506 mi

Diagnostic Radiology

1 SAINT FRANCIS DR
Greenville, SC 29601

Reassigned Medicare billing, Missouri enrollment
3 clinicians in this Medicare group

NPI 1083491906 (877) 224-8003

Advanced Radiology P A

727 mi

Diagnostic Radiology

21 CROSSROADS DR STE 100
Owings Mills, MD 21117

Reassigned Medicare billing, Missouri enrollment
2 clinicians in this Medicare group

NPI 1932167178 (888) 972-9700

St Paul Place Specialists Inc

735 mi

Diagnostic Radiology

301 ST. PAUL PLACE
Baltimore, MD 21202

Reassigned Medicare billing, Missouri enrollment
2 clinicians in this Medicare group

NPI 1497707681 (410) 332-9000

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 24

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Ct scan head or brain without contrast 70450

A CT scan of the head or brain without contrast is a non-invasive imaging procedure. It uses X-rays to create detailed pictures of your brain, skull, and other structures inside your head. It helps to detect conditions like strokes, tumors, or injuries. No dye (contrast) is used in this test.

724 services634 patients

Ct scan of upper spine without contrast 72125

A CT scan of the upper spine without contrast is a non-invasive imaging test that uses X-rays to capture detailed images of your neck and upper back. It helps in identifying issues like fractures, tumors, or infections. No dye (contrast) is used in this scan.

298 services289 patients

Mri scan of brain before and after contrast 70553

An MRI scan of the brain, both before and after contrast, helps visualize different brain structures. Initially, images are taken without a contrast agent. Then, a safe dye is injected which helps highlight certain areas, providing clearer, more detailed images.

266 services233 patients

Ct scan of lower spine without contrast 72131

A CT scan of the lower spine without contrast is a non-invasive imaging test. It uses X-rays to create detailed images of your lower back area, helping to detect conditions like fractures, infections, or tumors. It's painless and generally quick.

214 services212 patients

Ct scan of middle spine without contrast 72128

A CT scan of the middle spine without contrast is a non-invasive imaging test. It uses X-rays to create detailed pictures of your mid-spine area. This scan helps doctors identify issues like fractures, tumors, or infections. No dye is used in this procedure.

206 services204 patients

Ct scan of blood vessels of neck with contrast 70498

A CT scan of the neck's blood vessels with contrast is a diagnostic procedure. It uses X-rays and a special dye to create detailed images of your neck's blood vessels. This helps doctors detect issues such as blockages or abnormalities.

146 services143 patients

Mri scan of brain without contrast 70551

An MRI scan of the brain without contrast is a non-invasive imaging test. It uses a magnetic field and radio waves to create detailed images of your brain. It helps in detecting abnormalities like tumors, stroke, inflammation, or infection.

135 services132 patients

Ct scan of blood vessels of head with contrast 70496

A CT scan of the head's blood vessels with contrast is a diagnostic procedure. A special dye (contrast) is injected into your body to make the blood vessels visible on the scan. This helps identify issues like blockages or abnormalities in your head's blood vessels.

120 services119 patients

Ct scan of face without contrast 70486

A CT scan of the face without contrast is a non-invasive imaging procedure. It uses X-rays to create detailed pictures of your face, including bones, soft tissues, and blood vessels. It's often used to diagnose diseases, injuries, or abnormalities. No contrast dye is used in this procedure.

96 services95 patients

Mri scan of upper spinal canal before and after contrast 72156

An MRI scan of the upper spinal canal before and after contrast is a non-invasive imaging test. It uses magnetic fields and radio waves to create detailed images of your spine. Contrast dye is injected to enhance these images, providing clearer visuals for accurate diagnosis.

61 services57 patients

Mri scan of lower spinal canal before and after contrast 72158

An MRI scan of the lower spinal canal with contrast is a non-invasive imaging procedure. It uses magnetic fields to generate detailed images of your lower spine. A contrast agent is injected to enhance these images, helping doctors see issues more clearly.

48 services47 patients

Mri scan of middle spinal canal before and after contrast 72157

An MRI scan of the middle spinal canal with contrast is a non-invasive imaging test. It uses a magnetic field and radio waves to create detailed images of your spine, both before and after a contrast dye is injected. The dye helps to highlight certain structures, providing a clearer picture for diagnosis.

44 services43 patients

Mri scan of upper spinal canal without contrast 72141

An MRI scan of the upper spinal canal without contrast is a non-invasive imaging test. It uses a magnetic field and radio waves to create detailed images of your upper spine. This helps doctors identify issues such as injuries, infections or diseases. No dye is used.

39 services38 patients

Mri scan of blood vessels of head without contrast 70544

An MRI scan of the head's blood vessels without contrast is a non-invasive imaging procedure. It uses a magnetic field and radio waves to create detailed images of the blood vessels in your head. This helps doctors diagnose conditions such as stroke, aneurysm, or other vascular disorders.

38 services38 patients

X-ray of chest, 1 view 71045

A chest X-ray, 1 view, is a quick, painless test that produces images of the structures within your chest, such as your heart, lungs, and blood vessels. It helps in diagnosing conditions like pneumonia, heart problems, or lung cancer. You'll stand in front of a machine that emits X-rays, which pass through your body to create the image.

38 services37 patients

Mri scan of lower spinal canal without contrast 72148

An MRI scan of the lower spinal canal without contrast is a non-invasive imaging test. It uses a magnetic field and radio waves to produce detailed images of your lower spine. This helps identify issues like disc problems, tumors, or nerve conditions. No dye is used.

38 services37 patients

X-ray of chest, 1 view 71045

27 services25 patients

Mri scan of middle spinal canal without contrast 72146

An MRI scan of the middle spinal canal without contrast is a non-invasive imaging test. It uses magnetic fields and radio waves to create detailed images of your spine. This helps doctors identify any abnormalities or issues in your spinal canal. No dye is used in this procedure.

23 services23 patients

Mri scan of bone of eye socket, face, and/or neck before and after contrast 70543

An MRI scan of the eye socket, face, and/or neck uses magnetic fields to create detailed images of these areas. Contrast dye helps highlight specific tissues for clearer pictures. It's non-invasive, aids in detecting abnormalities, and guides treatment plans.

22 services22 patients

Mri scan of blood vessels of neck with contrast 70548

An MRI scan of the neck with contrast is a non-invasive imaging test. It uses a magnetic field and radio waves to create detailed pictures of your blood vessels in the neck. A contrast dye may be injected to make these images clearer. This helps identify any abnormalities.

20 services20 patients

Removal of spinal fluid with lower back spinal tap for diagnostic test using imaging guidance 62328

A lower back spinal tap, guided by imaging, is a procedure to collect spinal fluid for testing. A needle is carefully inserted into the lower back to draw out fluid. This can help diagnose various conditions. It's performed under local anesthesia to minimize discomfort.

19 services17 patients

Ct scan of abdomen and pelvis with contrast 74177

A CT scan of the abdomen and pelvis with contrast is an imaging procedure. A special dye, called contrast, is used to make certain areas more visible. This can help identify issues such as infections, tumors, or other abnormalities. The procedure is painless and usually takes about 30 minutes.

15 services15 patients

Ct scan of soft tissue of neck with contrast 70491

A CT scan of the neck with contrast is a non-invasive imaging procedure. A special dye is administered to highlight the soft tissues in your neck, making them easier to see. This helps detect issues like infections, tumors, or other abnormalities.

13 services13 patients

Ct scan of face with contrast 70487

A CT scan of the face with contrast is a non-invasive imaging test that uses X-rays and a contrast dye to create detailed images of your facial structures. The contrast dye helps to highlight specific areas, providing clearer images for more accurate diagnosis.

11 services11 patients

Hospital Affiliations CMS Care Compare 4

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Ssm Health St Mary's Hospital - St Louis

Acute Care Hospitals · Richmond Heights, MO

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number260091

Location6420 Clayton RdRichmond Heights, MO 63117 · St. Louis County

Emergency services Birthing friendly

Ssm Health Saint Louis University Hospital

Acute Care Hospitals · Saint Louis, MO

1/5 CMS rating

OwnershipVoluntary non-profit - Church

CMS Certification Number260105

Location3635 Vista AveSaint Louis, MO 63110 · St. Louis City County

Emergency services

Ssm St Joseph Hospital West

Acute Care Hospitals · Lake Saint Louis, MO

3/5 CMS rating

OwnershipVoluntary non-profit - Church

CMS Certification Number260200

Location100 Medical PlazaLake Saint Louis, MO 63367 · St. Charles County

Emergency services Birthing friendly

Ohio State University State Health System

Acute Care Hospitals · Columbus, OH

4/5 CMS rating

OwnershipGovernment - State

CMS Certification Number360085

Location410 West 10th AvenueColumbus, OH 43210 · Franklin County

Emergency services Birthing friendly

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

92.56/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

Quality

91.25

Improvement Activities

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DOUG LONGO APRN

Nurse Practitioner (Acute Care)